Making Irresistible Baked Zucchini Spinach and Feta Casserole is straightforward if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish.

2. Prepare the Zucchini: Slice the zucchini into thin rounds and set aside.

3. Sauté Spinach: In a large skillet, heat the olive oil over medium heat. Add the chopped spinach and cook for about 2-3 minutes until wilted. Remove from heat.

4. Mix the Egg Mixture: In a large bowl, whisk together the eggs and milk. Stir in the garlic powder, onion powder, salt, and pepper.

5. Layer the Ingredients: In the prepared baking dish, layer half of the zucchini slices at the bottom. Spread the sautéed spinach over the zucchini, followed by half of the feta cheese and half of the mozzarella cheese.

6. Add More Layers: Repeat the layering process with the remaining zucchini, spinach, feta, and mozzarella cheese.

7. Pour Egg Mixture: Pour the egg mixture evenly over the layers in the baking dish. Use a fork to gently press down any visible zucchini to ensure they are submerged.

8. Sprinkle Parmesan: Top with grated Parmesan cheese for an added layer of flavor and crispiness.

9. Bake: Place the casserole in the preheated oven and bake for 40-45 minutes, or until the top is golden brown and the casserole is set.

10. Cool and Slice: Once baked, remove from the oven and let it cool for about 10 minutes before slicing.